easter() is, for the moment, an alias to gregorian_easter(), since that's what most people use now. The thought was to somehow know which of the other methods to call, that that proved to be rather sticky.

Since the dates that various countries switched to the Gregorian calendar vary greatly, it's hard to figure out when to use which method. Perhaps some sort of locale checking would be cool?

I need to test the Julian easter calculations, but I'm a little confused as to the difference between the Orthodox Easter and the Julian Easter. I need to read some more.

The use of localtime and timelocal locks us into the epoch, which is a rather silly limitation. Need to move to Date::DayOfWeek or other module to calculate the day of the week. This should immediately make the module usable back to the beginning of celebration of Easter.

Yes, Date::Manip already has code in it to do this. But Date::Manip is very big, and rather slow. I needed something faster and smaller, and did not need all that other stuff. And I have a real interest in date calculations, so I thought this would be fun. Date::Manip is a very cool module. I use it myself.